Index: sys/netinet/in_mcast.c
===================================================================
--- sys/netinet/in_mcast.c	(revision 363386)
+++ sys/netinet/in_mcast.c	(working copy)
@@ -309,8 +309,10 @@
 	IN_MULTI_LOCK();
 	SLIST_FOREACH_SAFE(inm, &inm_free_tmp, inm_nrele, tinm) {
 		SLIST_REMOVE_HEAD(&inm_free_tmp, inm_nrele);
+		CURVNET_SET(inm->inm_ifp->if_vnet);
 		MPASS(inm);
 		inm_release(inm);
+		CURVNET_RESTORE();
 	}
 	IN_MULTI_UNLOCK();
 }